$PDFPath = "your directory containing pdf files"
$PrinterName = "HP LaserJet 1020"

$PDFs = Get-ChildItem $PDFPath -Filter *.pdf

# foreach ($PDF in $PDFs) {
#     Start-Process -FilePath $PDF.FullName -Verb PrintTo -ArgumentList $PrinterName
# }

Start-Process powershell.exe -ArgumentList "-Command", "Get-ChildItem C:\"